additional powdered sugar for dusting
Stir together flour and powdered sugar; cut in butter until mixture clings together. Pat into 8-inch square pan. Bake for 10-12 minutes until just golden brown.
Beat eggs; add sugar and lemon juice. Beat until thick and smooth. Add 2 Tbsp. flour and baking powder. Pour over baked layer. Bake at 350° for 20-25 minutes. Sift powdered sugar over.
Cool, cut into bars. Makes 16 (2x2") squares.